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using Manic Miner and Jet Set Willy game engines
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Message: 6978
Author: ian.rushforth
Date: 13/12/2016
Subject: Cell-Graphics Bug
I've just noticed this comment on Andrew's MM Room-format webpage, which intrigued me:
> There's a similar bug in the Jet Set Willy game-engine, though not identical - try writing "West of Kitchen" or "The Wine Cellar" (Rooms 24 and 49 respectively in the original Jet Set Willy) in Manic Miner, and you'll see that Manic Miner will corrupt some block-graphics that Jet Set Willy does not!
Surely the basic mechanism behind the bug is the same for both JSW and MM: namely, that the CPIR loop exits too early if it picks up a graphic byte that matches the colour-attribute byte of one of the cell-types?
So, does the difference arise from the order in which the various cell-types are listed within the two game engines? (e.g. Fire is defined before Conveyor in JSW, whereas Fire comes after Conveyor in MM.)
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